PHP - get multiple columns from array

Question

I have this array:

0 => array:3 [
    \"product_id\" => \"1138\"
    \"product_image\" => \"/resources/medias/shop/products/shop-6500720--1.png\"
           


        

Answer 1

An added feature to the array_columns function that eventually traces back to Chayan's answer, this time extended from Joseph Mangion's function.

I occasionally have long lists of the selected columns where I want to preserve the keys and don't necessarily want to follow the cumbersome ['orignal_field_name'] => ['original_field_name'] format for a great number of fields.

This version preserves the original key for each field by default unless a new key is specified.

// See answer from Joseph Mangion: https://stackoverflow.com/questions/52706383/php-get-multiple-columns-from-array
/** Function - array_columns  Selects columns from multidimensional array and renames columns as required
*
* @param  array $in_array, array $select_columns_rename_keys
*   example of $select_columns_rename_keys:
*       ['new_column_name1' => 'original_column_name1', 'original_column_name2', 'original_column_name3', 'new_column_name4' => 'original_column_name4', ...]
*       This will use the original keys for columns 2 and 3 and rename columns 1 and 4
* @return array
* @access public
* 
*/   

public function array_columns($in_array, $select_columns_rename_keys) {
    foreach ($select_columns_rename_keys as $k => $v)
        if (is_int($k)) {
            $select_columns_rename_keys[$v] = $v;
            unset($select_columns_rename_keys[$k]);
        }
    $keys = array_flip($select_columns_rename_keys);
    $filtered_array =
        array_map(function($a) use($keys) {
        $data = array_intersect_key($a, $keys);
        $return_array = [];
        foreach ($data as $column_name => $value) $return_array[$keys[$column_name]] = $value;
        return $return_array;
    }, $in_array);

    return $filtered_array;
}